TY - JOUR

T1 - Interrupted ageing in steels

T2 - Hardness improvement and microstructural stabilization

AU - Kim, B.

AU - Celada, C.

AU - San Martín, D.

AU - Chao, J.

AU - Vara, J.

AU - Rivera-Díaz-Del-Castillo, P. E.J.

PY - 2013/6

Y1 - 2013/6

N2 - Similarly to aluminium alloys, interrupted ageing in steels may increase hardness by 10%. By adding an intermediate stage between quenching and tempering, where quenched martensite is left to age at room temperature, carbon forms finer precipitate microstructures, which become more stable at room temperature. Using thermoelectric power to model carbon segregation to dislocations, it appears that room temperature ageing increases the number of effective nucleation sites for the subsequent tempering stage, as reflected in the microstructure and hardness.

AB - Similarly to aluminium alloys, interrupted ageing in steels may increase hardness by 10%. By adding an intermediate stage between quenching and tempering, where quenched martensite is left to age at room temperature, carbon forms finer precipitate microstructures, which become more stable at room temperature. Using thermoelectric power to model carbon segregation to dislocations, it appears that room temperature ageing increases the number of effective nucleation sites for the subsequent tempering stage, as reflected in the microstructure and hardness.

KW - Ageing

KW - Carbides

KW - Hardness

KW - Interstitial diffusion

KW - Martensitic steels

U2 - 10.1016/j.scriptamat.2013.02.036

DO - 10.1016/j.scriptamat.2013.02.036

M3 - Journal article

AN - SCOPUS:84876295843

VL - 68

SP - 945

EP - 948

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

IS - 12

ER -